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四川盆地自晚震旦亚代到三叠世,沉积了厚约6000米的海相地层,其中碳酸盐岩层约3000米、页岩及泥岩约2400米、膏盐层约600米。在已知的气田中,发现了15个碳酸盐岩气层,即震旦系上统(Zb~(3-4))气层,寒武系中上统洗象池组中部(ε_(2+3))气层,奥陶系下统罗汉坡组下段(O_1)气层,石炭系中统(C_2)气层,二叠系下统(阳新统P_1~2、P_1~3)气层,二叠系上统(乐平统P_2~2)气层,三叠系下统飞仙关组(Tf~1)和嘉陵江组(Tc~1、Tc~2、Tc~3、Tc~5)气层、中统雷口坡组(Tr~1、Tr~3)气层等。这些气层产出的天然气,均不同程度地含有硫化氢气体。因此,对天然气中硫化氢的形成和分布进行研究,无疑对天然气的勘探具有一定意义。
The Sichuan Basin, from Late Sinian to Triassic, deposited about 6,000 meters of marine strata, including about 3,000 meters of carbonate rock, about 2,400 meters of shale and mudstone, and about 600 meters of gypsum salt. In the known gas fields, 15 carbonate gas reservoirs have been discovered, namely, the Sinian epicenter (Zb ~ (3-4)) gas layer, the middle part of the Cambrian middle-upper Xiuxian pool (ε_ ( (O 2), Carboniferous (C 2) gas layer, Lower Permian P 1 ~ 2, P 1 ~ 3 gas in Lower Ordovician Luohanpo Formation (Tp ~ 1) and Jialing River (Tc ~ 1, Tc ~ 2, Tc ~ 3, Tc ~ 5) ) Gas layer and the Central Leopou Slope Formation (Tr ~ 1, Tr ~ 3). The natural gas produced by these gas layers contains hydrogen sulfide gas to varying degrees. Therefore, the research on the formation and distribution of hydrogen sulfide in natural gas undoubtedly has some significance for the exploration of natural gas.